Micro-tweezers: Design, fabrication, simulation and testing of a pneumatically actuated micro-gripper for micromanipulation and microtactile sensing

Alogla, Ageel F.; Amalou, F.; Balmer, C.; Scanlan, P.; Shu, Wenmiao; Reuben, Robert Lewis

doi:10.1016/j.sna.2015.06.032

Cited by 41 publications

(27 citation statements)

References 22 publications

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“…2,4,5,16,21,22 For instance, electrostatic actuation is difficult to operate in liquid environments and for large displacements, 23 while actuators based on the shape-memory alloy are hard to control and cannot transmit motions to adapt to a shape change of cargo because of their thermomechanical nonlinearities and stiff external characteristics. 24,25 In order to provide electrical power or gas sources for pneumatically actuated platforms, 14,15 some auxiliary equipment have been presented, which led to an increase in weight and complexity of operating systems. Moreover, limited by the driving mechanism, chemical regulation 26 and heat actuation 11,12 (i.e., hydrogel) usually work in some specific solution and need to change the characteristics of the whole environment to realize the expected trajectory.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Driving Flowerlike Soft Platform: Biomimetic Fabrication and External Regulation

Wei

Wang

et al. 2016

ACS Appl. Mater. Interfaces

118

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Nature-inspired actuators that can be driven by various stimuli are an emerging application in mobile microrobotics and microfluidics. In this study, a soft and multiple-environment-adaptive robotic platform with ferromagnetic particles impregnated in silicon-based polymer is adopted to fabricate microrobots for minimally invasive locomotion and control interaction with their environment. As an intelligent structure of platform, the change of its bending, deformation, and flapping displacement is rapid, reversible, and continuously controllable with sweeping and multicycle magnetic actuation. The bending angle of the soft platform (0.2 mm in thickness and 8.5 mm in length) can be deflected up to almost 90° within 2.7 s. Experiments demonstrated that the flexible platform of human skin-like material in various shapes, that is, flowerlike shapes, can transport a cargo to targeted area in air and a variety of liquids. It indicates excellent magnetic-actuation ability and good controllability. The results may be helpful in developing a magnetic-driven carrying platform, which can be operated like a human finger to manipulate biological objects such as single cells, microbeads, or embryos. Especially, it is likely to be used in harsh chemical and physical circumstances.

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Section: Introductionmentioning

confidence: 99%

Magnetic Driving Flowerlike Soft Platform: Biomimetic Fabrication and External Regulation

Wei

Wang

et al. 2016

ACS Appl. Mater. Interfaces

118

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“…However, the temperature of ice is low, which may affect the shape of some precision components. Most of the objects used in the traditional methods have been cells [13,14] or spherical particles [15]. At the same time, the traditional manipulation tool is too large for carrying out complex assembly work.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Picking Up Metal Microcomponents Based on Electrochemistry

Rong

et al. 2019

Micromachines

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The technology of picking up microcomponents plays a decisive role in the assembly of complex systems in micro- and nanoscale. The traditional method of picking up microcomponents with a mechanical manipulation tool can easily cause irreversible damage to the object, and only one object can be manipulated at a time. Furthermore, it is difficult to release the object with this method, and the release location is not accurate. With the aim of solving the above problems, the present study proposes an electrochemistry-based method for picking up metal microcomponents. First, the effect of ambient relative humidity on pickup was analyzed, and the effect of current density and electrolyte concentration on the deposition was examined. Then, a force analysis in the process of manipulation was carried out. Through the analysis of influence factors, the ideal experimental parameters were obtained theoretically. Finally, a simulation was carried out with COMSOL Multiphysics based on the above analysis. Copper microwires with a diameter of 60 μm and lengths of 300, 500, and 700 μm were successfully picked up and released using a pipette with a nozzle diameter of 15 μm. Compared with the traditional method, this method is simple to manipulate. Furthermore, it has a high success rate, causes less damage to the object, and good releasing accuracy.

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“…However, optical traps have significant limitations for practical contact charging studies. For example, light-sensitive materials cannot be evaluated as powders and substrates because of material deterioration due to the laser irradiation [ 15 ]. In addition, because the force acting on an object typically lies in the range of 1 to 100 pN [ 16 ], which is much smaller than the typical adhesive force on a microparticle of a few to hundreds of nN, vibration of the substrate to decrease the adhesion between the particle and the substrate is required [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

An Evaluation System for the Contact Electrification of a Single Microparticle Using Microelectromechanical-Based Actuated Tweezers

Yamaguchi

2018

Sensors

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The image quality of laser and multi-function printers that make use of electrophotography depends on the amount of surface charge generated by contact electrification on the toner particles. However, because it has been impossible to experimentally evaluate such amounts under controlled contact conditions using macroscopic measurements, theoretical elucidation of the contact electrification mechanism has not progressed sufficiently. In the present study, we have developed a system to experimentally evaluate the contact electrification of a single particle using atomic force microscopy (AFM) and nanotweezers (microelectromechanical systems (MEMS)-based actuated tweezers). This system performs, in succession, (i) a contact test that makes use of the nanotweezers and three piezoelectric stages, and (ii) an image force measurement using the AFM cantilever. Using this system, contact electrification was evaluated under controlled conditions, such as the contact number and the indentation depth. In addition, differences in contact electrification due to the amount of external surface additives were investigated. The results reveal that a coating with external additives leads to a decrease in the amount of contact electrification due to a reduction in the contact area with the substrate.

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Micro-tweezers: Design, fabrication, simulation and testing of a pneumatically actuated micro-gripper for micromanipulation and microtactile sensing

Cited by 41 publications

References 22 publications

Magnetic Driving Flowerlike Soft Platform: Biomimetic Fabrication and External Regulation

Magnetic Driving Flowerlike Soft Platform: Biomimetic Fabrication and External Regulation

Simulation of Picking Up Metal Microcomponents Based on Electrochemistry

An Evaluation System for the Contact Electrification of a Single Microparticle Using Microelectromechanical-Based Actuated Tweezers

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